Grand Canyon National Park

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29. 2013.

Credit: National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

Clouds all the way to the horizon in the Grand Canyon, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

A view of the canyon's South Rim, covered in fog, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

A vertical panorama of frosted plants, with the foggy canyon in the background, 2013.

Credit: Erin Whittaker/National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, 2013.

Credit: J. Pope/National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

A view of the fog-filled canyon from Mather Point. NPS photographer Erin Whittaker wrote, "Rangers wait for years to see it. Word spread like wildfire and most ran to the rim to photograph it. What a fantastic treat for all! ", Nov. 29. 2013.

Credit: Erin Whittaker/National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, 2013.

Credit: J. Pope/National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, taken just after 8 a.m, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29, 2013.

Credit: National Park Service

Grand Canyon National Park

NPS photographer Erin Whittaker wrote, "The canyon gave us a second rare inversion in three days. Freezing fog dominated yesterday and is reflected in great patterns on this Kaibab Limestone. By the end of the day the sun was able to burn it all away no doubt making many first time visitors very happy.", Nov. 29, 2013.

Credit: Erin Whittaker/National Park Service

Grand Canyon National Park

A view of the Grand Canyon filled with fog due to a temperature inversion, Nov. 29, 2013.